Fixed #68: Implement SheerkaQL

Fixed #70: SheerkaFilterManager : Pipe functions
Fixed #71: SheerkaFilterManager : filter_objects
Fixed #75: SheerkaMemory: Enhance memory() to use the filtering capabilities
Fixed #76: SheerkaEvaluateConcept: Concepts that modify the state of the system must not be evaluated during question

src/core/sheerka/services/SheerkaAdmin.py

@@ -3,7 +3,7 @@ import time
 from os import path
 
 from core.builtin_concepts_ids import BuiltinConcepts, BuiltinContainers
-from core.builtin_helpers import ensure_concept_or_rule
+from core.builtin_helpers import ensure_concept_or_rule, ensure_concept
 from core.concept import Concept
 from core.global_symbols import SHEERKA_BACKUP_FOLDER
 from core.sheerka.services.SheerkaHistoryManager import SheerkaHistoryManager
@@ -37,6 +37,7 @@ class SheerkaAdmin(BaseService):
         self.sheerka.bind_service_method(self.admin_history, False, as_name="history")
         self.sheerka.bind_service_method(self.admin_history, False, as_name="history")
         self.sheerka.bind_service_method(self.sdp, False)
+        self.sheerka.bind_service_method(self.atomic_def, False)
 
     def caches_names(self):
         """
@@ -218,6 +219,20 @@ class SheerkaAdmin(BaseService):
 
         return self.sheerka.isinstance(a, b)
 
+    @staticmethod
+    def atomic_def(a):
+        """
+        Return the 'atomic definition' of a concept
+        a concept key stripped from its 'var' tokens
+        >>> assert atomic_def(Concept('a plus b').def_var("a").def_var("b")) == "plus"
+        >>> assert atomic_def(Concept('x is a y').def_var("x").def_var("y")) == "is a"
+        :param a:
+        :return:
+        """
+        ensure_concept(a)
+
+        return a.get_atomic_def()
+
     @staticmethod
     def is_container(obj):
         """